Installation Instructions for GMC Safari Van and Chevrolet Astro Van (Extended Body)

Part Numbers:

• N75122
• Fastener Kit: F75122

Wiring Access Location:

• SUV4

Tools Required:

• Wrenches: 15mm, 17mm
• Drill Bits: None required

Step-by-Step Instructions:

1. Remove two bolts per side attaching the bumper bracket to the frame.
   • Note: The bumper and bracket will remain rigidly attached to the vehicle when these bolts are removed.
2. Lift the receiver into position, centering slots in the side bracket over the weldnuts in the frame.
3. Install the M10 bolts removed in Step #1.
4. Install M10 x 1.50 x 35mm hex bolts and conical toothed washers through the slots in the frame into the weldnuts.
5. Tighten all M10 fasteners to 42 lb-ft.

Hardware List:

• (2) M10 x 1.50 x 35mm CL10.9 Hex Bolts
• (2) Conical Toothed Washers
• (2) Existing M10 Bolts (removed in Step #1)

Safety Notes:

• Check the hitch frequently, ensuring all fasteners and the ball are properly tightened.
• If the hitch is removed, plug all holes in the trunk pan or other body panels to prevent the entry of water and exhaust fumes.
• Replace any hitch or ball that has been damaged.
• Observe safety precautions when working beneath a vehicle and wear eye protection.
• Follow the vehicle manufacturer's specifications for maximum trailer weight and tongue weight.
• Do not cut access or attachment holes with a torch.

Specifications:

• Maximum Load Ratings:
  • Weight Distributing:
    • Gross Trailer Weight: 6,000 lbs (2,724 kg)
    • Tongue Weight: 600 lbs (272 kg)
  • Weight Carrying (Ball Mount):
    • Gross Trailer Weight: 3,500 lbs (1,588 kg)
    • Tongue Weight: 300 lbs (136 kg)
• Hitch Type: Class III
• Approximate Hitch Weight: 47 lbs
• Compliance: This product meets safety specifications as per V.E.S.C. Regulation V-5 and SAE J684.

Note: Always ensure compliance with the towing vehicle manufacturer’s weight rating or the hitch's maximum load rating, whichever is lower.

Installation Instructions for Trailer Light Wiring Kit

Part Number:

• 20252

Tools Required:

• Hot Air Gun or Appropriate Heat Source
• Wire Crimpers
• Drill (3/32” Drill Bit)
• Phillips Head Screwdriver
• Circuit Tester

Step-by-Step Instructions:

Step 1: Locate the Taillight Wiring Harness

1. Access the vehicle's taillight wiring harness.
2. Using the provided instructions, identify the appropriate wires for connection:
   • Green Wire: Right Turn & Stop
   • Yellow Wire: Left Turn & Stop
   • Brown Wire: Taillights
   • White Wire: Ground

Step 2: Make the Electrical Connections

1. Match the color-coded wires from the wiring kit to the corresponding vehicle wires.

   • Use a circuit tester to verify each wire's function before connecting.
   • CAUTION: Test one wire at a time to prevent damage to electronic components.

2. Connect the wires using the provided insulated butt connectors:

   • Strip the ends of each wire and seat them properly in the connector.
   • Use a crimping tool designed for insulated splices to secure the connections.

3. Heat the connectors:

   • Apply heat directly to the center of each splice using a hot air gun.
   • Work from the center outward until the tubing recovers and adhesive flows.
   • Allow the connections to cool before inspecting for integrity.

Step 3: Ground the System

1. Locate a grounding point near the wiring harness, such as the vehicle frame or cross member.
   • Do not drill into the vehicle floor or bed.
2. Clean the area to remove dirt, rust, or undercoating.
3. Drill a 3/32" hole at the grounding point and secure the white wire using the provided eyelet and screw.

Step 4: Verify the Installation

1. Test all connections using a circuit tester or trailer:
   • Verify the functionality of taillights, turn signals, and brake lights.
   • Ensure all connections are complete and secure.
2. If issues are identified, double-check the wiring and connections for errors.

Step 5: Store the 4-Flat Connector

• Store the 4-flat connector in the rear cargo area when not in use to protect it from damage and environmental exposure.

Warnings and Notes:

• WARNING: Overloading a circuit can cause fires. Do not exceed the following limits:
  • Stop/Turn Lights: 7.5 amps (1 per side)
  • Tail Lights: 7.5 amps
• WARNING: Always verify what is behind any surface before drilling to avoid vehicle damage or injury.
• NOTE: Trailer lighting that requires more than 7.5 amps per circuit must use a Trailer Light Power Converter.
• NOTE: If your trailer requires a plug other than the 4-flat, consult your dealer for optional 6-way or 7-way adapters.

Maintenance:

• Inspect the wiring harness periodically for damage, corrosion, or loose connections.
• Reapply heat to connectors if the adhesive seal weakens.

Specifications:

• Maximum Load:
  • Stop/Turn Lights: 7.5 amps (1 per side)
  • Tail Lights: 7.5 amps
• Recommended Grounding Hole Size: 3/32 inches